Mistakes about the nature of a signed document

Question

Explain the mistakes about the nature of a signed document?

Answer 1

People who are sightless, uneducated, as well as incapable to read the language the contract was written in are usually protected under the plea of non est. Factum. Since these people must ultimately rely on the integrity of another persons. Relevant agreement could be void. Nevertheless, it is now improbable that other people who sign documents can avoid liability to innocent third parties except in extraordinary circumstances.

As the decision of the Supreme Court of Canada in Marvco Color Research Ltd. v. Harris, a signer can avoid the consequences of a document he or she has signed only if

1. The mistake is a serious one

2. The signer has not been careless of his or her own interests.